In a small bowl combine all ingredients for the shrimp marinade and stir. Place peeled and deveined shrimp in a resealable bag and add the marinade to coat the shrimp. Place sealed bag in the refrigerator for 20 minutes.,Meanwhile, in a large bowl combine jicama, orange, red onion, cilantro, garlic, oil, and lime juice. Stir well. Set aside until ready to use.,______,Stack corn tortillas on top of each other and wrap in a damp paper towel and microwave on high for 1 minute. To Serve: Place 2 corn tortillas on 4 plates and top each tortilla with a little of the salsa mixture and 3 pieces of shrimp per tortilla. Serve with leftover lime wedges cut into small pieces, if desired.